00:01
Norred to answer this question, let's talk about cell division.
00:02
It says, as a germline precursor, cell undergoes spermatogenesis, non -dischunction of the y chromosome occurs in myiosis 2.
00:10
So in this case, remember that you have this genotype.
00:14
And during myosis 1, in very general terms, what happens is that the x chromosome moves here and the y chromosome moves here.
00:21
Then what happens during myiosis 2, in very general terms, you are going to replicate this x, and you're going to move, or you're going to have one here and another x here.
00:31
And the same for the y chromosome.
00:33
But in this case, it says that there is a non -disjunction of the y chromosome here.
00:38
So instead of one y moving here and another y moving here, both are going to move together to this cell, for example.
00:45
And you have zero y chromosomes here and two y chromosomes here.
00:49
And it says, if the four sperm cells produced by this myiosis, each went to fertilize a haploid egg, so a haploid egg that is like this, that is like this, because eggs are produced.
01:00
By females and females are xx.
01:03
So they can produce only gametes that carry the x chromosome.
01:07
He says, which of the following statements would be true of the four results of zygote? select two answers.
01:13
So let's go for a question or for statement a or one.
01:17
It says, at least one zygote with kleinephalter syndrome would be produced.
01:21
So first, let's make the combinations.
01:23
If this goes with this, you're going to have x plus x2, normal xxx.
01:31
If it goes with this one here, you have the same.
01:35
X plus x is equal to x, x.
01:38
If this goes with this one here, you're going to get x plus 0, this is equal to x, 0.
01:45
And finally, with this one here, you're going to get x plus y, y, y is equal to x, y, y.
01:51
This is not kineinfeltered syndrome.
01:52
Cleanifelter syndrome is x, x, y.
01:55
Okay? so, one is false...